[1000mp] ARRL REVIEW ROOFING FILTER

[Ron]

You try it and let me know.  Better yet get 10 people in a room and  
have them all listen but keep the modified radio as an unknown.   We did 
this with distortion on video in the cable TV industry and as far as 
distortion for beats once one hits about -55 nobody could tell must 
difference. 

Ron   WA0KDS




John L Merrill wrote:

>You mean that the guys at ARRL couldn't or really didn't hear a difference?
>
>:-)
>
>John N1JM
>
>-----Original Message-----
>From: 1000mp-bounces at mailman.qth.net
>[mailto:1000mp-bounces at mailman.qth.net]On Behalf Of Ron
>Sent: Thursday, December 23, 2004 2:02 PM
>To: All about Yaesu 1000mp
>Subject: Re: [1000mp] ARRL REVIEW ROOFING FILTER
>
>
>Come on now  I have been there.   There  is no  way that anyone can tell 
>the difference between -69 and -79 .  The ear is just not that good.  
>Sorry.  A lot of hype out there to sell radios and filters.   You spent 
>the money and wanted to hear and improvement so did.  The mind work 
>wonders to do what you want it to do.  
>
>Ron   WA0KDS
>
>
>
>D. J. wrote:
>
>  
>
>>Dirk,
>>
>>Here are some numbers:
>>
>>MKV noise floor before the INRAD roofing -123 and after -130
>>
>>Blocking at 20 khz spacing before 130 db   after 146 db
>>5 khz spacing before 105 db after 130 db
>>1 khz spacing before 104 db after 106 db
>>
>>IMD dynamic range 20 khz spacing before 88 db after 93
>>2 khz spacing before 69 after 79
>>On Dec 23, 2004, at 10:51, ON4ADZ wrote:
>>
>>The report says "improvement is notable".
>>
>> I have it installed in my own MKV and It's a noticeable improvement 
>>without affecting the normal SSB audio.  AM even sounds ok to my old 
>>ears.  I highly recommend it.
>>
>>73
>>Dale, K9VUJ
>>
>>
>>    
>>
>>>Dear
>>>
>>>I am intrested in a summary of this arrl only member review.
>>>
>>>
>>>With thanks,
>>>
>>>ON4ADZ
>>>dirk
>>>on4adz at skynet.be
>>>
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>>>1000mp mailing list
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>>>      
>>>
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>>
>>    
>>
>
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